ZIP codes

ZIP codes in Middlesex County, Massachusetts

Middlesex County has 83 ZIP codes. 81 lie entirely inside it and 2 are shared with neighboring counties, so part of their land and their people are elsewhere. About 1,637,087 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 83; With 1% or more of their land inside
Entirely inside: 81; 99% or more of their land
Shared with other counties: 2; Most with Norfolk County (1)
Most populated ZIP: 02148; 65,906 people · Malden
Least populated ZIP: 01718; 404 people
Largest ZIP by land: 01450; 33 sq mi · Groton

Map of the ZIP codes in Middlesex County

Entirely in the county (99% or more of its land)
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Middlesex County

83 ZIP codes in Middlesex County, MA, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
01431	—	3,211	100%	3,211
01432	Devens	8,521	100%	8,521
01434	Devens	1,564	17%	≈ 525
01450	Groton	11,356	100%	11,356
01460	Littleton Common	10,280	100%	10,280
01463	Pepperell	11,697	100%	11,697
01464	Shirley	6,976	100%	6,976
01469	Townsend	6,820	100%	6,820
01474	—	2,280	100%	2,280
01701	Framingham	32,618	100%	32,618
01702	Framingham	39,789	100%	39,789
01718	—	404	100%	404
01719	—	5,496	100%	5,496
01720	—	23,526	100%	23,526
01721	—	18,873	100%	18,873
01730	Burlington	14,707	100%	14,707
01731	Hanscom AFB	2,110	100%	2,110
01741	—	5,239	100%	5,239
01742	West Concord	18,448	100%	18,448
01746	—	15,094	100%	15,094
01748	Hopkinton	19,358	100%	19,358
01749	Hudson	20,077	100%	20,077
01752	Marlborough	41,647	100%	41,647
01754	Maynard	10,712	100%	10,712
01760	Cochituate	36,782	100%	36,782
01770	—	4,427	100%	4,427
01773	Waltham	4,891	100%	4,891
01775	Maynard	7,165	100%	7,165
01776	—	19,270	100%	19,270
01778	Cochituate	14,033	100%	14,033
01801	Woburn	41,939	100%	41,939
01803	Burlington	26,274	100%	26,274
01821	Pinehurst	30,143	100%	30,143
01824	Lowell	26,650	100%	26,650
01826	Methuen Town	32,629	99.4%	≈ 32,492
01827	—	3,408	100%	3,408
01850	Lowell	17,740	100%	17,740
01851	Lowell	33,403	100%	33,403
01852	Lowell	37,144	100%	37,144
01854	Lowell	30,081	100%	30,081
01862	—	12,129	100%	12,129
01863	—	9,796	100%	9,796
01864	—	15,765	100%	15,765
01867	Reading	25,612	100%	25,612
01876	—	31,004	99.1%	≈ 30,840
01879	—	12,550	100%	12,550
01880	Wakefield	27,793	100%	27,793
01886	—	24,690	100%	24,690
01887	Wilmington	23,336	100%	23,336
01890	Winchester	23,406	100%	23,406
02138	Cambridge	38,509	100%	38,509
02139	Cambridge	40,033	100%	40,033
02140	Cambridge	21,204	100%	21,204
02141	Cambridge	14,517	100%	14,517
02142	Cambridge	4,737	100%	4,737
02143	Somerville	25,513	100%	25,513
02144	Somerville	25,448	100%	25,448
02145	Somerville	27,495	100%	27,495
02148	Malden	65,906	100%	65,906
02149	Everett	50,045	99.9%	≈ 50,023
02155	Medford	61,730	100%	61,730
02176	Melrose	29,650	100%	29,650
02180	Stoneham	23,355	100%	23,355
02420	Lexington	16,215	100%	16,215
02421	Lexington	18,080	100%	18,080
02451	Waltham	17,393	100%	17,393
02452	Waltham	15,808	100%	15,808
02453	Waltham	31,591	100%	31,591
02458	Newton	13,050	100%	13,050
02459	Newton	18,449	100%	18,449
02460	Newton	10,099	100%	10,099
02461	Newton	6,975	100%	6,975
02462	Newton	1,470	100%	1,470
02464	Newton	3,833	100%	3,833
02465	Newton	11,697	100%	11,697
02466	Newton	8,679	100%	8,679
02467	Brookline	23,001	29%	≈ 7,608
02468	Newton	5,773	100%	5,773
02472	Watertown Town	35,620	100%	35,620
02474	Arlington	28,642	100%	28,642
02476	Arlington	17,708	100%	17,708
02478	Belmont	27,175	100%	27,175
02493	—	11,579	100%	11,579

ZIP codes shared with other counties

These 2 ZIP codes have part of their land in another county. The first figure is the share of their land in Middlesex County; then, where the rest lies.

01434 (Devens): 17% here; 83% in Worcester County.
02467 (Brookline): 29% here; 59% in Norfolk County and 12% in Suffolk County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Newton (9), Cambridge (5), Lowell (5), Waltham (4), Somerville (3), and Arlington (2); 37 places in all.

They start with 5 different three-digit prefixes, one per USPS sorting center: 014, 017, 018, 021, and 024.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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